In this revised edition each chapter has been divided into different sections and each section begins with pertinent Definitions, Principles and Formulae with Objective Type Illustrations which help the reader to understand the basic principles and their applications. This is followed by graded set of Solved Examples consisting of Multiple Choice Questions (MCQs) with exactly one correct answer and Numerical Value Type Questions (NVTQs). These solved examples serve to illustrate and amplify the theory and provide repetition of basic principles which is very vital to effective learning. Solved MCQs